import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;

class IntCmp implements Comparator<Integer> {

    @Override
    public int compare(Integer o1, Integer o2) {
        return o2.compareTo(o1);
    }
}
public class test {
    public static void main(String[] args) {
        Map<Integer,Integer> map = new HashMap<>();
        map.put(1,1);
        map.put(2,2);
        map.put(3,3);
        map.put(4,4);
        map.put(5,5);
        System.out.println(map.size());
    }
    public static void main1(String[] args) {
        PriorityQueue priorityQueue = new PriorityQueue();
        System.out.println(priorityQueue.isFull());
        System.out.println(priorityQueue.isEmpty());
        priorityQueue.push(1);
        priorityQueue.push(2);
        priorityQueue.push(3);
        priorityQueue.push(4);
        priorityQueue.push(5);
        System.out.println(priorityQueue.usedSize);
        System.out.println(priorityQueue.usedSize);
    }
}

